Steps

The Ardumower Mini can run the same software as the 'big Ardumower'. For the PCB, you don't need to use an Ardumower PCB - instead you can (with some limitation) connect the components directly to the Arduino Mega as shown below. The limitations are: there will be no battery charging circuit, no charging station, and of course your wiring will not look as nice as a ready PCB :-)

For software download, see the Ardumower PCB/code page. In the Arduino IDE, go into file 'config.h', and activate the pin configuration for the Ardumower Mini (enable '#define USE_MINI' and disable '#define USER_MOWER'). Now the code will use the Ardumower Mini pin configuration file ('mini.cpp').

NOTE: Do not use more than 7 volt to operate the mini DC motors!

Important: Connect motor driver GND to Arduino GND, so both share a common GND!